usr.sbin/mixer/mixer.c

   1 /*
   2  *      This is an example of a mixer program for Linux
   3  *
   4  *      updated 1/1/93 to add stereo, level query, broken
   5  *              devmask kludge - cmetz@thor.tjhsst.edu
   6  *
   7  * (C) Craig Metz and Hannu Savolainen 1993.
   8  *
   9  * You may do anything you wish with this program.
  10  *
  11  * ditto for my modifications (John-Mark Gurney, 1997)
  12  *
  13  * $FreeBSD: head/usr.sbin/mixer/mixer.c 230611 2012-01-27 09:15:55Z mav $
  14  */
  15
  16 #include <err.h>
  17 #include <fcntl.h>
  18 #include <libgen.h>
  19 #include <limits.h>
  20 #include <stdio.h>
  21 #include <string.h>
  22 #include <stdlib.h>
  23 #include <unistd.h>
  24 #include <sys/soundcard.h>
  25
  26 static const char *names[SOUND_MIXER_NRDEVICES] = SOUND_DEVICE_NAMES;
  27
  28 static void     usage(int devmask, int recmask);
  29 static int      res_name(const char *name, int mask);
  30 static void     print_recsrc(int recsrc, int recmask, int sflag);
  31
  32 static void
  33 usage(int devmask, int recmask)
  34 {
  35         int     i, n;
  36
  37         printf("usage: mixer [-f device] [-s | -S] [dev [+|-][voll[:[+|-]volr]] ...\n"
  38             "       mixer [-f device] [-s | -S] recsrc ...\n"
  39             "       mixer [-f device] [-s | -S] {^|+|-|=}rec rdev ...\n");
  40         if (devmask != 0) {
  41                 printf(" devices: ");
  42                 for (i = 0, n = 0; i < SOUND_MIXER_NRDEVICES; i++) {
  43                         if ((1 << i) & devmask)  {
  44                                 if (n)
  45                                         printf(", ");
  46                                 printf("%s", names[i]);
  47                                 n++;
  48                         }
  49                 }
  50         }
  51         if (recmask != 0) {
  52                 printf("\n rec devices: ");
  53                 for (i = 0, n = 0; i < SOUND_MIXER_NRDEVICES; i++) {
  54                         if ((1 << i) & recmask)  {
  55                                 if (n)
  56                                         printf(", ");
  57                                 printf("%s", names[i]);
  58                                 n++;
  59                         }
  60                 }
  61         }
  62         printf("\n");
  63         exit(1);
  64 }
  65
  66 static int
  67 res_name(const char *name, int mask)
  68 {
  69         int     i;
  70
  71         for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
  72                 if ((1 << i) & mask && strcmp(names[i], name) == 0)
  73                         break;
  74
  75         if (i == SOUND_MIXER_NRDEVICES)
  76                 return (-1);
  77
  78         return (i);
  79 }
  80
  81 static void
  82 print_recsrc(int recsrc, int recmask, int sflag)
  83 {
  84         int     i, n;
  85
  86         if (recmask == 0)
  87                 return;
  88
  89         if (!sflag)
  90                 printf("Recording source: ");
  91
  92         for (i = 0, n = 0; i < SOUND_MIXER_NRDEVICES; i++) {
  93                 if ((1 << i) & recsrc) {
  94                         if (sflag)
  95                                 printf("%srec ", n ? " +" : "=");
  96                         else if (n)
  97                                 printf(", ");
  98                         printf("%s", names[i]);
  99                         n++;
 100                 }
 101         }
 102         if (!sflag)
 103                 printf("\n");
 104 }
 105
 106 int
 107 main(int argc, char *argv[])
 108 {
 109         char    mixer[PATH_MAX] = "/dev/mixer";
 110         char    lstr[5], rstr[5];
 111         char    *name, *eptr;
 112         int     devmask = 0, recmask = 0, recsrc = 0, orecsrc;
 113         int     dusage = 0, drecsrc = 0, sflag = 0, Sflag = 0;
 114         int     l, r, lrel, rrel;
 115         int     ch, i, bar, baz, dev, m, n, t;
 116
 117         if ((name = strdup(basename(argv[0]))) == NULL)
 118                 err(1, "strdup()");
 119         if (strncmp(name, "mixer", 5) == 0 && name[5] != '\0') {
 120                 n = strtol(name + 5, &eptr, 10) - 1;
 121                 if (n > 0 && *eptr == '\0')
 122                         snprintf(mixer, PATH_MAX - 1, "/dev/mixer%d", n);
 123         }
 124         free(name);
 125         name = mixer;
 126
 127         n = 1;
 128         for (;;) {
 129                 if (n >= argc || *argv[n] != '-')
 130                         break;
 131                 if (strlen(argv[n]) != 2) {
 132                         if (strcmp(argv[n] + 1, "rec") != 0)
 133                                 dusage = 1;
 134                         break;
 135                 }
 136                 ch = *(argv[n] + 1);
 137                 if (ch == 'f' && n < argc - 1) {
 138                         name = argv[n + 1];
 139                         n += 2;
 140                 } else if (ch == 's') {
 141                         sflag = 1;
 142                         n++;
 143                 } else if (ch == 'S') {
 144                         Sflag = 1;
 145                         n++;
 146                 } else {
 147                         dusage = 1;
 148                         break;
 149                 }
 150         }
 151         if (sflag && Sflag)
 152                 dusage = 1;
 153
 154         argc -= n - 1;
 155         argv += n - 1;
 156
 157         if ((baz = open(name, O_RDWR)) < 0)
 158                 err(1, "%s", name);
 159         if (ioctl(baz, SOUND_MIXER_READ_DEVMASK, &devmask) == -1)
 160                 err(1, "SOUND_MIXER_READ_DEVMASK");
 161         if (ioctl(baz, SOUND_MIXER_READ_RECMASK, &recmask) == -1)
 162                 err(1, "SOUND_MIXER_READ_RECMASK");
 163         if (ioctl(baz, SOUND_MIXER_READ_RECSRC, &recsrc) == -1)
 164                 err(1, "SOUND_MIXER_READ_RECSRC");
 165         orecsrc = recsrc;
 166
 167         if (argc == 1 && dusage == 0) {
 168                 for (i = 0, n = 0; i < SOUND_MIXER_NRDEVICES; i++) {
 169                         if (!((1 << i) & devmask))
 170                                 continue;
 171                         if (ioctl(baz, MIXER_READ(i),&bar) == -1) {
 172                                 warn("MIXER_READ");
 173                                 continue;
 174                         }
 175                         if (Sflag || sflag) {
 176                                 printf("%s%s%c%d:%d", n ? " " : "",
 177                                     names[i], Sflag ? ':' : ' ',
 178                                     bar & 0x7f, (bar >> 8) & 0x7f);
 179                                 n++;
 180                         } else
 181                                 printf("Mixer %-8s is currently set to "
 182                                     "%3d:%d\n", names[i], bar & 0x7f,
 183                                     (bar >> 8) & 0x7f);
 184                 }
 185                 if (n && recmask)
 186                         printf(" ");
 187                 print_recsrc(recsrc, recmask, Sflag || sflag);
 188                 return (0);
 189         }
 190
 191         argc--;
 192         argv++;
 193
 194         n = 0;
 195         while (argc > 0 && dusage == 0) {
 196                 if (strcmp("recsrc", *argv) == 0) {
 197                         drecsrc = 1;
 198                         argc--;
 199                         argv++;
 200                         continue;
 201                 } else if (strcmp("rec", *argv + 1) == 0) {
 202                         if (**argv != '+' && **argv != '-' &&
 203                             **argv != '=' && **argv != '^') {
 204                                 warnx("unknown modifier: %c", **argv);
 205                                 dusage = 1;
 206                                 break;
 207                         }
 208                         if (argc <= 1) {
 209                                 warnx("no recording device specified");
 210                                 dusage = 1;
 211                                 break;
 212                         }
 213                         if ((dev = res_name(argv[1], recmask)) == -1) {
 214                                 warnx("unknown recording device: %s", argv[1]);
 215                                 dusage = 1;
 216                                 break;
 217                         }
 218                         switch (**argv) {
 219                         case '+':
 220                                 recsrc |= (1 << dev);
 221                                 break;
 222                         case '-':
 223                                 recsrc &= ~(1 << dev);
 224                                 break;
 225                         case '=':
 226                                 recsrc = (1 << dev);
 227                                 break;
 228                         case '^':
 229                                 recsrc ^= (1 << dev);
 230                                 break;
 231                         }
 232                         drecsrc = 1;
 233                         argc -= 2;
 234                         argv += 2;
 235                         continue;
 236                 }
 237
 238                 if ((t = sscanf(*argv, "%d:%d", &l, &r)) > 0)
 239                         dev = 0;
 240                 else if ((dev = res_name(*argv, devmask)) == -1) {
 241                         warnx("unknown device: %s", *argv);
 242                         dusage = 1;
 243                         break;
 244                 }
 245
 246                 lrel = rrel = 0;
 247                 if (argc > 1) {
 248                         m = sscanf(argv[1], "%7[^:]:%7s", lstr, rstr);
 249                         if (m > 0) {
 250                                 if (*lstr == '+' || *lstr == '-')
 251                                         lrel = rrel = 1;
 252                                 l = strtol(lstr, NULL, 10);
 253                         }
 254                         if (m > 1) {
 255                                 if (*rstr == '+' || *rstr == '-')
 256                                         rrel = 1;
 257                                 r = strtol(rstr, NULL, 10);
 258                         }
 259                 }
 260
 261                 switch (argc > 1 ? m : t) {
 262                 case 0:
 263                         if (ioctl(baz, MIXER_READ(dev), &bar) == -1) {
 264                                 warn("MIXER_READ");
 265                                 argc--;
 266                                 argv++;
 267                                 continue;
 268                         }
 269                         if (Sflag || sflag) {
 270                                 printf("%s%s%c%d:%d", n ? " " : "",
 271                                     names[dev], Sflag ? ':' : ' ',
 272                                     bar & 0x7f, (bar >> 8) & 0x7f);
 273                                 n++;
 274                         } else
 275                                 printf("Mixer %-8s is currently set to "
 276                                     "%3d:%d\n", names[dev], bar & 0x7f,
 277                                     (bar >> 8) & 0x7f);
 278
 279                         argc--;
 280                         argv++;
 281                         break;
 282                 case 1:
 283                         r = l;
 284                         /* FALLTHROUGH */
 285                 case 2:
 286                         if (ioctl(baz, MIXER_READ(dev), &bar) == -1) {
 287                                 warn("MIXER_READ");
 288                                 argc--;
 289                                 argv++;
 290                                 continue;
 291                         }
 292
 293                         if (lrel)
 294                                 l = (bar & 0x7f) + l;
 295                         if (rrel)
 296                                 r = ((bar >> 8) & 0x7f) + r;
 297
 298                         if (l < 0)
 299                                 l = 0;
 300                         else if (l > 100)
 301                                 l = 100;
 302                         if (r < 0)
 303                                 r = 0;
 304                         else if (r > 100)
 305                                 r = 100;
 306
 307                         if (!Sflag)
 308                                 printf("Setting the mixer %s from %d:%d to "
 309                                     "%d:%d.\n", names[dev], bar & 0x7f,
 310                                     (bar >> 8) & 0x7f, l, r);
 311
 312                         l |= r << 8;
 313                         if (ioctl(baz, MIXER_WRITE(dev), &l) == -1)
 314                                 warn("WRITE_MIXER");
 315
 316                         argc -= 2;
 317                         argv += 2;
 318                         break;
 319                 }
 320         }
 321
 322         if (dusage) {
 323                 close(baz);
 324                 usage(devmask, recmask);
 325                 /* NOTREACHED */
 326         }
 327
 328         if (orecsrc != recsrc) {
 329                 if (ioctl(baz, SOUND_MIXER_WRITE_RECSRC, &recsrc) == -1)
 330                         err(1, "SOUND_MIXER_WRITE_RECSRC");
 331                 if (ioctl(baz, SOUND_MIXER_READ_RECSRC, &recsrc) == -1)
 332                         err(1, "SOUND_MIXER_READ_RECSRC");
 333         }
 334
 335         if (drecsrc)
 336                 print_recsrc(recsrc, recmask, Sflag || sflag);
 337
 338         close(baz);
 339
 340         return (0);
 341 }